Wire connectors meant for direct bury use, no junction box required. Silicone filled connectors protect wires from water, dust and dirt. Certified UL 486D as a sealed wire connector system. Water and corrosion proof materials provide consistent, superior performance. Meant for wires ranging from size 22 to 8. Easy one-step installation, with no pre-twisting required. Temperature rated up to 221 degree Fahrenheit.